Today’s Astronomical Events – May 18th, 2015

2015-05-18 New Moon

New Moon occurs every month when the Moon passes between the Earth and the Sun. This graphic shows the positions of the Moon, Earth and the other planets in their orbits. From Earth’s vantage point, Mars is behind the Sun and Mercury will also soon be invisible. Venus, however, still has some way to go and continues to be easily visible in the early evening sky after sunset.

(Click on an image to enlarge.)

Images courtesy of Mobile Observatory. 



04:13 UT – New Moon. (Taurus, not visible.)

18:40 UT – The just-past new Moon passes Mars. (Mars: 100% illuminated, magnitude 1.5, diameter 3.7”. Taurus, not visible.)



Events in bold involve objects and/or events that are visible with the naked eye.

All times are in Universal Time (UTC). To convert the time to your timezone, click here.

Learn more about upcoming astronomical events in 2015 An Astronomical Year (Kindle Edition) and The Astronomical Almanac (2015-2019) (Kindle Edition and Paperback Edition) and 2016 An Astronomical Year (North American Kindle Edition.)

The Amateur Astronomer’s Notebook allows astronomers to log 150 observing sessions and includes an appendix of hundreds of suggested deep sky objects.

Details of all available books across the world can be found here or by visiting the author’s page on Amazon.

If you have any comments or questions, please feel free to contact me at astronomywriter “at”


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